Predictive Correlational Studies Are Designed to Provide a Way to Predict

Predictive correlational studies are designed to provide a way to predict the value of one variable, in relation to another variable. Which of the following research studies are predictive correlational in design?

A) One that studies the relationship of hospital admission blood alcohol level in chronic alcoholics to the amount of time that elapses before delirium tremens begin
B) One that classifies patients coming to an emergency department as critically ill, acutely ill, or not acutely ill
C) One that quantifies the probability that adolescents completing a one-day type I diabetes workshop will develop ketoacidosis in the following year
D) One that studies both girls and boys in grammar school and counts the number of interactions they have with one another daily
E) One that describes the incidence of postterm labor in all counties of New York state
F) One that measures the effect of a researcher-applied independent variable upon a dependent variable